Tag: indexes

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indexes

indexes : SQL | Columnstore Index

indexes : A column store index is an index that was designed mainly for improving the query performance for workloads with very large amounts of data.This type of index stores the index data in a column based format rather than row based as is done with traditional indexes. Benifits of columnstore indexMain b...

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indexes

indexes : SQL | Full Text Index

indexes : A special type of index that provides index access for full-text queries against character or binary column data.A full-text index breaks the column into tokens and these tokens make up the index data.This feature lets users and application run character-based lookups efficiently by creating a parti...

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indexes

indexes : SQL | Spatial index

indexes : A spatial index is a type of extended index that allows you to index a spatial columnA spatial column is a table column that contains data of a spatial data type, such as geometry or geography.Spatial indexes require that the database table that you are creating the spatial index on also has a clust...

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indexes

indexes : SQL | XML index

indexes : An XML index is an index type that is specifically built to handle indexing XML type columns.  Why use an XML index?The main reason for creating indexes on XML columns is performance.  The BLOB datatype is used to store XML columns, which can occasionally be rather big, making runtime XML ...

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indexes

indexes : SQL | Filtered Indexes

indexes : A SQL Server filtered index is a non-clustered index that allows us to apply specific conditions to cover a subset of rows in the table. This can save on space, improve on query performance and reduce maintenance overhead as the index is much smaller.For Example, we have a student table and in our w...

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indexes

indexes : SQL | Index with included columns

indexes : An index created with included columns is a non-clustered index that also includes non-key columns in the leaf nodes of the index, similar to a clustered index. Benefits of included columns1. Gives you the ability to include columns types that are not allowed as index keys in your index.2. when all ...

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indexes

indexes : SQL | Covering index

indexes : A covering index is an index which is made up of all (or more) of the columns required to satisfy a query as key columns of the index. When a covering index can be used to execute a query, fewer IO operations are required since the optimizer no longer has to perform extra lookups to retrieve the act...

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indexes

indexes : SQL | NON Clustered Index

indexes : The non-clustered index resembles a book's index. If you want to read a certain topic or chapter, you can jump right to that page by utilising the book's index, which includes the chapter name and page number. No need to go through each and every page of a book. The data is stored in one place, and ...

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indexes

indexes : SQL | Clustered Index

indexes : An index is a disk-based structure linked to a table or view that facilitates quicker row retrieval.A table or view’s table or view’s columns are used to create keys in an index.These keys are kept in a structure (B-tree) that enables SQL Server to quickly and effectively locate the row or rows that...

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indexes

indexes : SQL | Indexes

indexes : Indexes are special data structures associated with tables or views that help speed up the query. It makes the querying process fast by providing easy access to rows in data tablesAn index is a schema object. It is used by the server to speed up the retrieval of rows by using a pointer. It can reduc...

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